Originally Posted By Dr_Nimslow:
Originally Posted By Sig_Prude:
What's up with the magnetic compass anyway?
The compass is one of those things that always makes me wonder "what were they thinking"?. My best guess, is that's the best place they could find, to put it, that keeps it away from all the electrical interference, mostly from the heated windscreens.
With all due respect to my friend Kent, he is not totally correct. There are two mirrors used to view the compass.
The Whiskey compass on the DC-9-80 series, is mounted near the ceiling, behind, and to the right, of the first officers head. Facing aft.
The compass is in the front of the cutout square in this picture.
<a href="http://s21.photobucket.com/user/nimslow/media/cmp2_zpsbe3873e6.jpg.html" target="_blank">http://i21.photobucket.com/albums/b299/nimslow/cmp2_zpsbe3873e6.jpg
Hard to get a good picture, but it's up in there.
<a href="http://s21.photobucket.com/user/nimslow/media/cmp1_zps26787b1a.jpg.html" target="_blank">http://i21.photobucket.com/albums/b299/nimslow/cmp1_zps26787b1a.jpg
Aft of the compass, facing forward, is a fixed mirror, that reflects the image of the compass forward. That's why the image is reversed, if you look back at the mirror.
<a href="http://s21.photobucket.com/user/nimslow/media/cmp6_zps1d7318ba.jpg.html" target="_blank">http://i21.photobucket.com/albums/b299/nimslow/cmp6_zps1d7318ba.jpg
<a href="http://s21.photobucket.com/user/nimslow/media/cmp5_zps3cc8c227.jpg.html" target="_blank">http://i21.photobucket.com/albums/b299/nimslow/cmp5_zps3cc8c227.jpg
Mounted on the top of the glare shield, are two, small, movable mirrors, that we can aim at the fixed mirror, behind the compass. These allow us to have a normal view of the compass rose.
<a href="http://s21.photobucket.com/user/nimslow/media/cmp3_zpsf064a831.jpg.html" target="_blank">http://i21.photobucket.com/albums/b299/nimslow/cmp3_zpsf064a831.jpg
<a href="http://s21.photobucket.com/user/nimslow/media/cmp4_zpsdbfff141.jpg.html" target="_blank">http://i21.photobucket.com/albums/b299/nimslow/cmp4_zpsdbfff141.jpg
Again..What were they thinking?